feat: add configurable agent ID support

Allow users to configure which OpenClaw agent the integration communicates
with, instead of always defaulting to the implicit 'main' agent.

Changes:
- const.py: add CONF_AGENT_ID, DEFAULT_AGENT_ID='main', ATTR_AGENT_ID
- api.py: accept agent_id in constructor; _headers() now includes the
  x-openclaw-agent-id header on every request; async_send_message and
  async_stream_message accept an optional per-call agent_id override
- config_flow.py: expose agent_id as a text field in both the manual
  setup step and the options flow (Settings → Integrations → Configure)
- __init__.py: read agent_id from options/data and pass it to the API
  client; add optional agent_id field to the send_message service schema
  so automations can address a specific agent per-call
- services.yaml: document the new agent_id field on send_message
- strings.json / translations/en.json: add UI labels for the new option

The gateway routing header x-openclaw-agent-id is always sent; when
agent_id is 'main' (the default) the gateway behaviour is unchanged.
A per-call override on send_message takes precedence over the config.

Implemented with assistance from an AI coding agent (BMO) with human
review. Bot-assisted contribution reviewed by a human before submission.

custom_components/openclaw/__init__.py

@@ -30,6 +30,7 @@ from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .api import OpenClawApiClient, OpenClawApiError
 from .const import (
+    ATTR_AGENT_ID,
     ATTR_ATTACHMENTS,
     ATTR_MESSAGE,
     ATTR_MODEL,
@@ -47,6 +48,7 @@ from .const import (
     ATTR_ACCOUNT_ID,
     ATTR_TIMESTAMP,
     CONF_ADDON_CONFIG_PATH,
+    CONF_AGENT_ID,
     CONF_GATEWAY_HOST,
     CONF_GATEWAY_PORT,
     CONF_GATEWAY_TOKEN,
@@ -63,6 +65,7 @@ from .const import (
     CONF_VOICE_PROVIDER,
     CONF_THINKING_TIMEOUT,
     CONTEXT_STRATEGY_TRUNCATE,
+    DEFAULT_AGENT_ID,
     DEFAULT_CONTEXT_MAX_CHARS,
     DEFAULT_CONTEXT_STRATEGY,
     DEFAULT_ENABLE_TOOL_CALLS,
@@ -106,6 +109,7 @@ SEND_MESSAGE_SCHEMA = vol.Schema(
         vol.Required(ATTR_MESSAGE): cv.string,
         vol.Optional(ATTR_SESSION_ID): cv.string,
         vol.Optional(ATTR_ATTACHMENTS): vol.All(cv.ensure_list, [cv.string]),
+        vol.Optional(ATTR_AGENT_ID): cv.string,
     }
 )
 
@@ -137,6 +141,11 @@ async def async_setup_entry(hass: HomeAssistant, entry: OpenClawConfigEntry) ->
     verify_ssl = entry.data.get(CONF_VERIFY_SSL, True)
     session = async_get_clientsession(hass, verify_ssl=verify_ssl)
 
+    # agent_id can come from options (user-changeable) or from initial config data
+    agent_id: str = entry.options.get(
+        CONF_AGENT_ID, entry.data.get(CONF_AGENT_ID, DEFAULT_AGENT_ID)
+    )
+
     client = OpenClawApiClient(
         host=entry.data[CONF_GATEWAY_HOST],
         port=entry.data[CONF_GATEWAY_PORT],
@@ -144,6 +153,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: OpenClawConfigEntry) ->
         use_ssl=use_ssl,
         verify_ssl=verify_ssl,
         session=session,
+        agent_id=agent_id,
     )
 
     coordinator = OpenClawCoordinator(hass, client)
@@ -385,6 +395,8 @@ def _async_register_services(hass: HomeAssistant) -> None:
         """Handle the openclaw.send_message service call."""
         message: str = call.data[ATTR_MESSAGE]
         session_id: str = call.data.get(ATTR_SESSION_ID) or "default"
+        # Per-call agent_id overrides the client-level default when provided.
+        call_agent_id: str | None = call.data.get(ATTR_AGENT_ID)
 
         entry_data = _get_first_entry_data(hass)
         if not entry_data:
@@ -420,6 +432,7 @@ def _async_register_services(hass: HomeAssistant) -> None:
                 message=message,
                 session_id=session_id,
                 system_prompt=system_prompt,
+                agent_id=call_agent_id,
             )
 
             if options.get(CONF_ENABLE_TOOL_CALLS, DEFAULT_ENABLE_TOOL_CALLS):
@@ -433,6 +446,7 @@ def _async_register_services(hass: HomeAssistant) -> None:
                         ),
                         session_id=session_id,
                         system_prompt=system_prompt,
+                        agent_id=call_agent_id,
                     )
 
             assistant_message = _extract_assistant_message(response)

custom_components/openclaw/api.py

@@ -51,6 +51,7 @@ class OpenClawApiClient:
         use_ssl: bool = False,
         verify_ssl: bool = True,
         session: aiohttp.ClientSession | None = None,
+        agent_id: str = "main",
     ) -> None:
         """Initialize the API client.
 
@@ -61,6 +62,7 @@ class OpenClawApiClient:
             use_ssl: Use HTTPS instead of HTTP.
             verify_ssl: Verify SSL certificates (set False for self-signed certs).
             session: Optional aiohttp session (reused from HA).
+            agent_id: Target OpenClaw agent ID (default: "main").
         """
         self._host = host
         self._port = port
@@ -68,6 +70,7 @@ class OpenClawApiClient:
         self._use_ssl = use_ssl
         self._verify_ssl = verify_ssl
         self._session = session
+        self._agent_id = agent_id
         self._base_url = f"{'https' if use_ssl else 'http'}://{host}:{port}"
         # ssl=False disables cert verification for self-signed certs;
         # ssl=None uses default verification.
@@ -82,11 +85,18 @@ class OpenClawApiClient:
         """Update the authentication token (e.g., after addon restart)."""
         self._token = token
 
-    def _headers(self) -> dict[str, str]:
+    def _headers(self, agent_id: str | None = None) -> dict[str, str]:
-        """Build request headers with auth token."""
+        """Build request headers with auth token and agent ID.
+
+        Args:
+            agent_id: Per-call agent ID override. Falls back to the
+                      client-level ``agent_id`` set in the constructor.
+        """
+        effective_agent = agent_id or self._agent_id or "main"
         return {
             "Authorization": f"Bearer {self._token}",
             "Content-Type": "application/json",
+            "x-openclaw-agent-id": effective_agent,
         }
 
     async def _get_session(self) -> aiohttp.ClientSession:
@@ -182,6 +192,7 @@ class OpenClawApiClient:
         model: str | None = None,
         system_prompt: str | None = None,
         stream: bool = False,
+        agent_id: str | None = None,
     ) -> dict[str, Any]:
         """Send a chat message (non-streaming).
 
@@ -190,6 +201,8 @@ class OpenClawApiClient:
             session_id: Optional session/conversation ID.
             model: Optional model override.
             stream: If True, raises ValueError (use async_stream_message).
+            agent_id: Optional per-call agent ID override (overrides the
+                      client-level default set in the constructor).
 
         Returns:
             Complete chat completion response.
@@ -213,7 +226,7 @@ class OpenClawApiClient:
             payload["model"] = model
 
         # Pass session_id as a custom header or param if supported by gateway
-        headers = self._headers()
+        headers = self._headers(agent_id=agent_id)
         if session_id:
             headers["X-Session-Id"] = session_id
             headers["x-openclaw-session-key"] = session_id
@@ -247,6 +260,7 @@ class OpenClawApiClient:
         session_id: str | None = None,
         model: str | None = None,
         system_prompt: str | None = None,
+        agent_id: str | None = None,
     ) -> AsyncIterator[str]:
         """Send a chat message and stream the response via SSE.
 
@@ -256,6 +270,8 @@ class OpenClawApiClient:
             message: The user message text.
             session_id: Optional session/conversation ID.
             model: Optional model override.
+            agent_id: Optional per-call agent ID override (overrides the
+                      client-level default set in the constructor).
 
         Yields:
             Content delta strings from the streaming response.
@@ -275,7 +291,7 @@ class OpenClawApiClient:
         if model:
             payload["model"] = model
 
-        headers = self._headers()
+        headers = self._headers(agent_id=agent_id)
         if session_id:
             headers["X-Session-Id"] = session_id
             headers["x-openclaw-session-key"] = session_id

custom_components/openclaw/config_flow.py

@@ -34,6 +34,7 @@ from .const import (
     ADDON_SLUG,
     ADDON_SLUG_FRAGMENTS,
     CONF_ADDON_CONFIG_PATH,
+    CONF_AGENT_ID,
     CONF_GATEWAY_HOST,
     CONF_GATEWAY_PORT,
     CONF_GATEWAY_TOKEN,
@@ -52,6 +53,7 @@ from .const import (
     BROWSER_VOICE_LANGUAGES,
     CONTEXT_STRATEGY_CLEAR,
     CONTEXT_STRATEGY_TRUNCATE,
+    DEFAULT_AGENT_ID,
     DEFAULT_GATEWAY_HOST,
     DEFAULT_GATEWAY_PORT,
     DEFAULT_CONTEXT_MAX_CHARS,
@@ -411,6 +413,7 @@ class OpenClawConfigFlow(ConfigFlow, domain=DOMAIN):
                         CONF_GATEWAY_TOKEN: token,
                         CONF_USE_SSL: use_ssl,
                         CONF_VERIFY_SSL: verify_ssl,
+                        CONF_AGENT_ID: user_input.get(CONF_AGENT_ID, DEFAULT_AGENT_ID),
                     },
                 )
             if "base" not in errors:
@@ -429,6 +432,7 @@ class OpenClawConfigFlow(ConfigFlow, domain=DOMAIN):
                     vol.Required(CONF_GATEWAY_TOKEN): str,
                     vol.Optional(CONF_USE_SSL, default=False): bool,
                     vol.Optional(CONF_VERIFY_SSL, default=True): bool,
+                    vol.Optional(CONF_AGENT_ID, default=DEFAULT_AGENT_ID): str,
                 }
             ),
             errors=errors,
@@ -453,6 +457,13 @@ class OpenClawOptionsFlow(OptionsFlow):
         selected_provider = options.get(CONF_VOICE_PROVIDER, DEFAULT_VOICE_PROVIDER)
 
         schema: dict[Any, Any] = {
+            vol.Optional(
+                CONF_AGENT_ID,
+                default=options.get(
+                    CONF_AGENT_ID,
+                    self._config_entry.data.get(CONF_AGENT_ID, DEFAULT_AGENT_ID),
+                ),
+            ): str,
             vol.Optional(
                 CONF_INCLUDE_EXPOSED_CONTEXT,
                 default=options.get(

custom_components/openclaw/const.py

@@ -23,6 +23,7 @@ CONF_GATEWAY_TOKEN = "gateway_token"
 CONF_USE_SSL = "use_ssl"
 CONF_VERIFY_SSL = "verify_ssl"
 CONF_ADDON_CONFIG_PATH = "addon_config_path"
+CONF_AGENT_ID = "agent_id"
 
 # Options
 CONF_INCLUDE_EXPOSED_CONTEXT = "include_exposed_context"
@@ -36,6 +37,7 @@ CONF_VOICE_PROVIDER = "voice_provider"
 CONF_BROWSER_VOICE_LANGUAGE = "browser_voice_language"
 CONF_THINKING_TIMEOUT = "thinking_timeout"
 
+DEFAULT_AGENT_ID = "main"
 DEFAULT_INCLUDE_EXPOSED_CONTEXT = True
 DEFAULT_CONTEXT_MAX_CHARS = 13000
 DEFAULT_CONTEXT_STRATEGY = "truncate"
@@ -130,6 +132,7 @@ ATTR_SESSION_KEY = "session_key"
 ATTR_DRY_RUN = "dry_run"
 ATTR_MESSAGE_CHANNEL = "message_channel"
 ATTR_ACCOUNT_ID = "account_id"
+ATTR_AGENT_ID = "agent_id"
 ATTR_OK = "ok"
 ATTR_RESULT = "result"
 ATTR_ERROR = "error"

custom_components/openclaw/services.yaml

@@ -24,6 +24,15 @@ send_message:
       selector:
         text:
           multiline: true
+    agent_id:
+      name: Agent ID
+      description: >
+        Optional OpenClaw agent ID to route this message to. Overrides the
+        agent ID configured in the integration options. Defaults to "main".
+      required: false
+      example: "main"
+      selector:
+        text:
 
 clear_history:
   name: Clear History

custom_components/openclaw/strings.json

@@ -18,7 +18,8 @@
           "gateway_port": "Gateway Port",
           "gateway_token": "Gateway Token",
           "use_ssl": "Use SSL (HTTPS)",
-          "verify_ssl": "Verify SSL certificate"
+          "verify_ssl": "Verify SSL certificate",
+          "agent_id": "Agent ID"
         }
       }
     },
@@ -37,6 +38,7 @@
         "title": "OpenClaw Options",
         "description": "Configure context and tool-calling behavior.",
         "data": {
+          "agent_id": "Agent ID (e.g. main)",
           "include_exposed_context": "Include exposed entities context",
           "context_max_chars": "Max context characters",
           "context_strategy": "When context exceeds max",
@@ -124,6 +126,10 @@
         "attachments": {
           "name": "Attachments",
           "description": "Optional file attachments."
+        },
+        "agent_id": {
+          "name": "Agent ID",
+          "description": "Optional OpenClaw agent ID to route this message to. Overrides the configured default. Defaults to \"main\"."
         }
       }
     },

custom_components/openclaw/translations/en.json

@@ -18,7 +18,8 @@
           "gateway_port": "Gateway Port",
           "gateway_token": "Gateway Token",
           "use_ssl": "Use SSL (HTTPS)",
-          "verify_ssl": "Verify SSL certificate"
+          "verify_ssl": "Verify SSL certificate",
+          "agent_id": "Agent ID"
         }
       }
     },
@@ -39,6 +40,7 @@
         "title": "OpenClaw Options",
         "description": "Configure context and tool-calling behavior.",
         "data": {
+          "agent_id": "Agent ID (e.g. main)",
           "include_exposed_context": "Include exposed entities context",
           "context_max_chars": "Max context characters",
           "context_strategy": "When context exceeds max",
@@ -126,6 +128,10 @@
         "attachments": {
           "name": "Attachments",
           "description": "Optional file attachments."
+        },
+        "agent_id": {
+          "name": "Agent ID",
+          "description": "Optional OpenClaw agent ID to route this message to. Overrides the configured default. Defaults to \"main\"."
         }
       }
     },